Rumor Mill : New Showcases

This past week, three new Showcase Presents books came up on Amazon.com, all with a June 6th release date. No description yet, just the titles and covers images :

Showcase Presents : Batman Vol.2
Showcase Presents : The Atom Vol.1
Showcase Presents : Who's Who Vol.1

I'd be surprised if DC puts out those three books the same month. Really surprised. Considering the lack of info on the Batman book, I'd put my money on The Atom and the previously announced Who's Who.